Milling machining center and shaft type workpiece clamp thereof

Abstract

The utility model discloses a milling machining center and a shaft type workpiece clamp thereof. The milling machining center comprises a base, a connecting plate, a shaft clamping block, a toggle clamp and a three-jaw chuck seat. The multiple shaft clamping blocks are limited on the connecting plate through pins and used for being matched with one another to form a bearing groove abutting against a shaft type workpiece, and the shaft type workpiece is borne on the shaft clamping blocks. The toggle clamp is connected with the shaft clamping block through a screw and used for abutting against the shaft type workpiece through a chuck of the toggle clamp, and the shaft type workpiece is fixed in the radial direction of the toggle clamp through cooperation of the shaft clamping block and the toggle clamp. The two three-jaw chuck seats are slidably connected to the milling machine workbench, located at the front end and the rear end of the connecting plate correspondingly and used for correspondingly clamping and fixing the two opposite ends of the shaft type workpiece correspondingly, the shaft type workpiece is fixed in the axial direction of the shaft type workpiece, the shaft type workpiece is prevented from deviating in the radial direction and the axial direction of the shaft type workpiece in the machining process, the milling precision is guaranteed, and the machining efficiency is improved. And the yield of the manufactured parts is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of milling machining centers, in particular to a milling machining center and a shaft-type workpiece fixture thereof. Background Art

[0002] Milling is a mechanical processing method that uses a milling cutter as a tool to process the surface of an object. With the development of science and technology and the improvement of the overall level of the manufacturing industry, enterprises have begun to use milling machining centers for milling operations to improve operation efficiency. The milling machining center can complete operations such as milling, boring, drilling, tapping, and cutting threads, and is suitable for precision machining of various parts.

[0003] For the milling of shaft-type workpieces, the prior art usually fixes both ends or the middle part of the shaft-type workpiece to a fixture such as a universal vise or a chuck, and then the milling cutter of the milling machining center mills its surface. These fixtures can only restrict the movement of the shaft-type workpiece in one direction. During the milling process, the milling cutter may generate axial and radial forces on the shaft-type workpiece. The approximately cylindrical shaft-type workpiece is not firmly clamped and is prone to a certain offset, thus affecting the machining accuracy and reducing the yield rate of the product. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a milling machining center and a shaft-type workpiece fixture thereof to solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a shaft-type workpiece fixture for a milling machining center. The milling machining center includes a milling machine workbench. The shaft-type workpiece fixture includes a base, a connecting plate, shaft clamping blocks, a toggle clamp, and a three-jaw chuck seat. Among them, the base is connected to the milling machine workbench; the connecting plate is provided with a plurality of mounting threaded holes and a plurality of positioning pin holes. The connecting plate is locked to the base through screws passing through the mounting threaded holes; a plurality of the shaft clamping blocks are limited on the connecting plate by pins arranged at the bottom of the connecting plate passing through the corresponding positioning pin holes, and are used to cooperate with each other to form a receiving groove for abutting against the side surface of the shaft-type workpiece, so that the shaft-type workpiece is placed on each shaft clamping block; the toggle clamp is connected to the shaft clamping block through a screw, and is used to abut against the side surface of the shaft-type workpiece through its chuck to press and embed the shaft-type workpiece into the receiving groove; two of the three-jaw chuck seats are slidably connected to the milling machine workbench and are respectively located at the front and rear ends of the connecting plate, and are used to respectively clamp the opposite ends of the shaft-type workpiece.

[0007] Preferably, the shaft-type workpiece fixture further includes a shaft anti-rotation seat, which can be connected to the connecting plate by a pin. The number of shaft anti-rotation seat is at least one pair. A step structure is formed on the opposite surfaces between each pair of shaft anti-rotation seats, and a step groove is formed in cooperation, which is used to clamp the shaft-type workpiece placed in the step groove to limit the rotation of the shaft-type workpiece.

[0008] Preferably, the three-jaw chuck seat includes a sliding seat and a three-jaw chuck body. A tail tenon that fits with the T-shaped groove opened on the milling machine workbench is provided at the bottom of the sliding seat, and it is slidably connected to the milling machine workbench. A chute extending in the height direction is opened on the surface of the sliding seat facing the connecting plate, and the three-jaw chuck body can move up and down relative to the sliding seat in the chute through a connecting slider.

[0009] Preferably, the opposite surfaces of the shaft clamping block are formed with slopes that gradually approach each other and extend downward, so that the receiving groove gradually becomes narrower downward.

[0010] Preferably, the toggle clamp is locked to the side surface of the shaft clamping block by screws.

[0011] Preferably, a plurality of the positioning pin holes are arranged in an array on the connecting plate.

[0012] The present invention also provides a milling machining center, which includes a milling machine workbench and the shaft-type workpiece fixture as described above.

[0013] The technical effects achieved by the technical solution of the present invention include:

[0014] By setting the shaft clamping block and the toggle clamp, the shaft clamping block is limited on the connecting plate by the pin arranged at the bottom of the connecting plate passing through the corresponding positioning pin hole, and is used to cooperate with each other to form a receiving groove for abutting against the side surface of the shaft-type workpiece. The toggle clamp abuts against the side surface of the shaft-type workpiece through its chuck, and presses the shaft-type workpiece into the receiving groove, so as to realize the fixation of the shaft-type workpiece in its radial direction. At the same time, two three-jaw chuck seats slidably connected to the milling machine workbench are provided, and the opposite ends of the shaft-type workpiece are respectively clamped by the two three-jaw chuck seats, so as to realize the fixation of the shaft-type workpiece in its axial direction, thereby ensuring the stability of the shaft-type workpiece in different directions, avoiding deviation during the machining of the milling machining center, ensuring the accuracy of the milling machining, and maintaining the yield rate of the manufactured parts;

[0015] To further adapt to the uneven convex and concave structures formed on the shaft-type workpiece, a pair of shaft anti-rotation seats forming a step groove are provided to limit the rotation of the shaft-type workpiece, and further increase the stability of the shaft-type workpiece during milling machining;

[0016] The opening of a plurality of positioning pin holes on the connecting plate enables the position point of the shaft clamping block fixed on the connecting plate to be changed according to the diameter size of the shaft-type workpiece, and further adjusts the width of the corresponding receiving groove, with strong adaptability. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the shaft - type workpiece fixture provided by the embodiment of the present utility model installed on a milling machine workbench;

[0018] Figure 2 It is a schematic diagram of the structure on the connecting plate of the shaft - type workpiece fixture;

[0019] Figure 3 It is a schematic diagram of the structure of the connecting plate;

[0020] Figure 4 It is an installation schematic diagram of the toggle clamp on the shaft clamping block.

[0021] The respective reference numerals in the above - mentioned drawings are as follows:

[0022] Milling machine workbench 100, shaft - type workpiece 200;

[0023] Base 1;

[0024] Connecting plate 2, installation threaded hole 210, positioning pin hole 220;

[0025] Shaft clamping block 3, receiving groove 30, slope 31;

[0026] Toggle clamp 4, chuck 41;

[0027] Three - jaw chuck seat 5, sliding seat 51, tail tenon 511, three - jaw chuck body 52, connecting slider 521;

[0028] Shaft anti - rotation seat 6, step groove 60, step structure 61. Detailed Embodiment

[0029] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will detail the specific embodiments of the present utility model with reference to the drawings. Examples of these preferred embodiments are illustrated in the drawings. The embodiments of the present utility model shown in the drawings and described according to the drawings are merely exemplary, and the present utility model is not limited to these embodiments.

[0030] Here, in order to avoid obscuring the present utility model with unnecessary details, only the structures and / or processing steps closely related to the solution of the present utility model are shown in the drawings, while other details of less relevance are omitted.

[0031] Referring to Figure 1 as shown, the embodiment of the present utility model provides a shaft - type workpiece fixture for a milling machining center, and the milling machining center includes a milling machine workbench 100.

[0032] The shaft-type workpiece fixture includes: a base 1, a connecting plate 2, a shaft clamping block 3, a toggle clamp 4, and a three-jaw chuck base 5.

[0033] Among them, the base 1 is connected to the milling machine workbench 100;

[0034] Combined Figure 2 and Figure 3 As shown, a plurality of mounting threaded holes 210 and a plurality of positioning pin holes 220 are provided on the connecting plate 2, and the connecting plate 2 is locked to the base 1 through screws passing through the mounting threaded holes 210;

[0035] A plurality of the shaft clamping blocks 3 are limited on the connecting plate 2 by pins provided at the bottom of the connecting plate 2 passing through the corresponding positioning pin holes 220, and are used to cooperate with each other to form a receiving groove 30 for abutting against the side surface of the shaft-type workpiece 200, that is, the shaft arc surface, so that the shaft-type workpiece 200 is placed on each shaft clamping block 3;

[0036] The toggle clamp 4 is connected to the shaft clamping block 3 by screws, and is used to abut against the side surface of the shaft-type workpiece 200 through its chuck 41 to press and embed the shaft-type workpiece 200 into the receiving groove 30;

[0037] Two of the three-jaw chuck bases 5 are slidably connected to the milling machine workbench 100, and are respectively located at the front and rear ends of the connecting plate 2, and are used to respectively clamp and fix the opposite ends of the shaft-type workpiece 200.

[0038] The usage process of the shaft-type workpiece fixture of the above-mentioned milling machining center is as follows:

[0039] Determine the width of the required receiving groove 30 according to the size of the shaft-type workpiece 200, so that the shaft-type workpiece 200 can be placed into the receiving groove 200, the lower side of the side surface of the shaft-type workpiece 200 is abutted and fixed, and stably placed on each shaft clamping block 3. Pass a pin through the shaft clamping block 3 to the corresponding positioning pin hole 220 to fix the clamping block 3 at a specified position on the connecting plate 2, and then lock the connecting plate 2 to the base 1 on the milling machine workbench 100 through screws; Place the shaft-type workpiece 200 into the receiving groove 30, and then rotate the chuck 41 of the toggle clamp 4 connected to the clamping block 3 to press the chuck 41 onto the upper side of the side surface of the shaft-type workpiece 200, thereby completing the clamping and fixing of the shaft-type workpiece 200 in its radial direction; Then, by respectively pushing the two three-jaw chuck bases 5, the two ends of the shaft-type workpiece 200 are respectively clamped into the middle of the three jaws of the three-jaw chuck base 5 facing them for clamping and fixing, and the two end faces of the shaft-type workpiece 200 are tightened, realizing its axial fixation.

[0040] This shaft-type workpiece fixture can fix the shaft-type workpiece 200 in its radial direction by the cooperation of the shaft clamping block 3 and the toggle clamp 4, and at the same time fix the shaft-type workpiece 200 in its axial direction by the cooperation of two three-jaw chuck seats 5, so as to ensure the stability of the shaft-type workpiece 200 in different directions, avoid deviation during the machining of the milling center, guarantee the accuracy of the milling process, and maintain the yield rate of the manufactured parts unaffected.

[0041] It should be noted here that locking structures for fixing themselves at designated positions on the T-slot of the milling machine table 100 are provided on both the base 1 and the three-jaw chuck seat 5. These locking structures include but are not limited to T-slot quick-release bolts, so as to keep in place without sliding after determining the required positions of the base 1 and the three-jaw chuck seat 5 on the milling machine table 100.

[0042] Furthermore, when bumpy convex block structures or groove structures are formed on the side surface of the shaft-type workpiece 200, fixture accessories with corresponding shapes can be set to clamp and engage, restricting the rotation of the shaft-type workpiece 200 around its central axis and further improving the stability of the shaft-type workpiece 200. Therefore, in this embodiment, the shaft-type workpiece fixture further includes a shaft rotation stop seat 6. The shaft rotation stop seat 6 can be connected to the connecting plate 2 by a pin. The number of the shaft rotation stop seats 6 is at least one pair. Step structures 61 are formed on the opposite surfaces between each pair of shaft rotation stop seats 6, cooperating to form a step groove 60 for clamping and placing the shaft-type workpiece 200 placed in the step groove 60 to restrict the rotation of the shaft-type workpiece 200. The step groove 60 is equivalent to continuous convex blocks, which can effectively prevent the shaft-type workpiece 200 with concave and convex structures from rotating freely and adapt to high-frequency milling cutters.

[0043] Specifically, the three-jaw chuck seat 5 includes a sliding seat 51 and a three-jaw chuck body 52. A tail tenon 511 that fits with the T-slot opened on the milling machine table 100 is provided at the bottom of the sliding seat 51, and it is slidably connected to the milling machine table 100. A chute extending in the height direction is opened on the surface of the sliding seat 51 facing the connecting plate 2. The three-jaw chuck body 52 can move up and down relative to the sliding seat 51 in the chute through a connecting slider 521, so as to adjust the height of the three-jaw chuck body 52 according to the height of the end face of the shaft-type workpiece 200.

[0044] In this embodiment, for the columnar structure of the shaft-type workpiece 200, gradually approaching and downwardly extending slopes 31 are formed on the opposite surfaces of the shaft clamping blocks 3, so that the receiving groove 30 formed by the opposite slopes 31 of the paired shaft clamping blocks 3 gradually narrows downward. When the shaft-type workpiece 200 is placed in the receiving groove 30, the two slopes 31 will respectively be tangent to the side surface of the axial workpiece 200, providing a force pointing to the midline. Cooperating with the downward pressure of the chuck 41 of the toggle clamp 4, the three forces point to the same position to fix the shaft-type workpiece 200 and restrict the radial movement of the shaft-type workpiece 200.

[0045] As shown in Figure 2 combination with Figure 4 the figure, since the chuck 41 of the conventional toggle clamp 4 rotates through its hinge structure, for the convenience of the toggle clamp 4 pressing down the shaft-type workpiece 200 towards the receiving groove 30, exemplarily, the toggle clamp 4 is attached to the side surface of the shaft clamping block 3 by screws. Similarly to the arrangement of the positioning pin holes 220 on the connecting plate 2, multiple screw holes arranged in an array can be provided on the shaft clamping block 3 to enable more selection ranges for the installation position points of the toggle clamp 4.

[0046] According to the parts of the shaft-type workpiece 200 with different diameters, the shaft clamping block 3 needs to be correspondingly adjusted in position on the connecting plate 2 so as to adjust the width of the formed receiving groove 30. Therefore, a sufficient number of positioning pin holes 220 corresponding to different position points should be provided on the connecting plate 2 to expand the adjustable range of the width of the receiving groove 30 and adapt to more sizes of the shaft-type workpiece 200 and its different parts. And these positioning pin holes 220 should be evenly distributed to facilitate the operator to freely select the position of the shaft clamping block 3 according to actual needs. Therefore, in this embodiment, multiple said positioning pin holes 220 are arranged in an array on the connecting plate 2. Further, multiple sizes of the positioning pin holes 220 can be selected.

[0047] The embodiment of the present utility model further provides a milling machining center, which includes a milling machine workbench 100 and the shaft-type workpiece fixture as described above.

[0048] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0049] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. An axis-type workpiece fixture for a milling machining center, the milling machining center comprising a milling machine worktable (100), characterized in that: The shaft type workpiece fixture comprises: A base (1), wherein the base (1) is connected to a milling machine workbench (100); A connecting plate (2), wherein a plurality of mounting threaded holes (210) and a plurality of positioning pin holes (220) are provided on the connecting plate (2), and the connecting plate (2) is fastened to the base (1) by screws passing through the mounting threaded holes (210); Axle clamping blocks (3), wherein a plurality of the axle clamping blocks (3) are positioned on the connecting plate (2) by means of pins provided at the bottom of the connecting plate (2) and passing through corresponding positioning pin holes (220), and are used to cooperate with each other to form a receiving groove (30) that abuts against the side of the axle-shaped workpiece (200), so that the axle-shaped workpiece (200) is received on each axle clamping block (3); A toggle clamp (4), the toggle clamp (4) being connected to the shaft clamping block (3) by means of a screw, and being used for abutting against the side surface of the shaft-shaped workpiece (200) through its clamping head (41), so as to press the shaft-shaped workpiece (200) into the receiving groove (30); A three-jaw chuck seat (5), two of which are slidably connected to a milling machine workbench (100), and are respectively located at the front and rear ends of the connecting plate (2), and are used to respectively correspond to the opposite ends of the clamped shaft-shaped workpiece (200).

2. The shaft-type workpiece fixture for a milling machining center according to claim 1, characterized in that: The shaft-type workpiece fixture also includes a shaft stop seat (6), and the shaft stop seat (6) can be connected to the connecting plate (2) by a pin. The number of the shaft stop seats (6) is at least one pair, and a step structure (61) is formed on the opposite surfaces between each pair of shaft stop seats (6), which cooperate to form a step groove (60) for clamping the shaft-type workpiece (200) inserted into the step groove (60) to limit the rotation of the shaft-type workpiece (200).

3. The shaft-type workpiece fixture for a milling machining center according to claim 1, characterized in that: The three-jaw chuck seat (5) comprises a slide seat (51) and a three-jaw chuck body (52); a tail tenon (511) which fits with a T-slot provided on a milling machine worktable (100) is provided at the bottom of the slide seat (51), and the slide seat is slidably connected to the milling machine worktable (100); a slide groove extending in a height direction is provided on a surface of the slide seat (51) facing the connecting plate (2); and the three-jaw chuck body (52) can move up and down relative to the slide seat (51) in the slide groove by connecting a slider (521).

4. The shaft-type workpiece fixture for a milling machining center according to claim 1, characterized in that: The opposite surfaces of the shaft clamping block (3) are formed with slopes (31) which gradually approach each other and extend downward, so that the receiving groove (30) gradually narrows downward.

5. The shaft-type workpiece fixture for a milling machining center according to claim 1, characterized in that: The toggle clamp (4) is screwed onto the side surface of the shaft clamping block (3).

6. The shaft-type workpiece fixture for a milling machining center according to claim 1, characterized in that: The plurality of positioning pin holes (220) are arranged in an array on the connecting plate (2).

7. A milling machining center, characterized in that: The invention comprises a milling machine workbench (100) and the shaft-type workpiece fixture as claimed in any one of claims 1 to 6.

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